Issue #24857: Comparing call_args to a long sequence now correctly returns a

boolean result instead of raising an exception.

Patch by A Kaptur.

Lib/unittest/mock.py

@@ -2005,8 +2005,7 @@ class _Call(tuple):
             else:
                 other_args = ()
                 other_kwargs = value
-        else:
-            # len 2
+        elif len_other == 2:
             # could be (name, args) or (name, kwargs) or (args, kwargs)
             first, second = other
             if isinstance(first, str):
@@ -2017,6 +2016,8 @@ class _Call(tuple):
                     other_args, other_kwargs = (), second
             else:
                 other_args, other_kwargs = first, second
+        else:
+            return False
 
         if self_name and other_name != self_name:
             return False

Lib/unittest/test/testmock/testmock.py

@@ -300,6 +300,9 @@ class MockTest(unittest.TestCase):
         self.assertEqual(mock.call_args,
                          ((sentinel.Arg,), {"kw": sentinel.Kwarg}))
 
+        # Comparing call_args to a long sequence should not raise
+        # an exception. See issue 24857.
+        self.assertFalse(mock.call_args == "a long sequence")
 
     def test_assert_called_with(self):
         mock = Mock()

Misc/NEWS

@@ -14,6 +14,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #24857: Comparing call_args to a long sequence now correctly returns a
+  boolean result instead of raising an exception.  Patch by A Kaptur.
+
 - Issue #23144: Make sure that HTMLParser.feed() returns all the data, even
   when convert_charrefs is True.